The Joule heat production rate and the particle energy injection rate as a function of the geomagnetic indices AE and AL

Physics

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Geomagnetism, Ionospheric Heating, Particle Energy, Polar Regions, Solar Terrestrial Interactions, Earth Magnetosphere, Ohmic Dissipation, Resistance Heating, Solar Wind

Scientific paper

Magnetic records from 71 stations were employed to determine the distribution of electric fields and currents in the polar ionosphere for March 17, 18, and 19, 1978. Hourly distribution maps of the Joule heat production rate, the particle energy injection rate, and their sum over the entire polar region on the three days were calculated. For constructing the hourly distribution maps, the conductivity distribution was inferred at each instant partially on the basis of an empirical method developed by Ahn et al. (1982). The particle energy injection rate was estimated in a similar fashion by employing an empirical method. The data set allowed the estimation of the global Joule heat production rate, the global particle energy injection rate, and the sum of the two quantities. It was determined that the three global quantities (watt) are related almost linearly to the AE(nT) and AL(nT) indices.

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